added a basic logo and icon. require SSL since facebook only allows one URL for desktop and one for mobile (which I am hijacking for the locahost dev server).
support invitations. needed jquery to handle the click().
remove debug
invitation code uses jQuery
extend access token
show friends of friends that use the application by location. i believe it needed a few addtional application permissions but it is hard to test because the GraphAPI debug tools does it from the GraphAPI's app perspective and not the current app.